Grows kinda like lilac but alot slower. I'd do 2 seeds per pot and them plant them at the end of summer where you want them. You can even keep them in the pot for another year before planting. Hope this helps! :)
These are beautiful. I just lost my house due to disability/bankruptcy, and I had trained one of these as a tree. It was right outside my bedroom window. They are gorgeous!
It's OK-I'm in a new place, a rental, and a friend is my landlord, so it works pretty well. I transplanted a bunch of stuff from my old house, but couldn't move the Rose of Sharon. Just hope I bid high enough on these, I'd love to have them outside my window again :)